Thermostat.



D. BELDEN.

THERMOSTAT.

APPUCATIN FllED MAH. 28| 1914. y 215154,361 PafntedSept. 21, 1915.

3` SHEETS-SHEET 1.

D. BELDEN.

THERMOSTAT.

APPLICATION FILED MAR. 28, I9 1,154,361. M Patentedsept. 21, 1915.

3 SHEETS-SHEET 2.

D. BELDEN.

THERMOSTAT.

APPLICATION FILED 11111.28. 1914.

Patented Sept. 21, 1915.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

DAVID BELDEN. OFAUBURN, NEW YORK, ASSIGNOR TO JEWELL MANUFACTURINGCOMPANY, F AUBURN, NEW YORK, A CDRPORATION 0F NEW\YORK.

THERMOSTAT.

Specification of Letters Patent.

Patented Sept. 21, 1915.

Application led March 28, 1914. Serial No. 828,048.

mostats in which a clock mechanism is .em-

ployed for the purpose of changing the adjustment of the thermostaticelement at a predetermined time.. This device is employed frequently inconnection with damper controlling mechanism operatively connected witha heating plant or furnace for heating dwellings` and other buildings,or

with controlling mechanism for valves for heating or cooling systems o1'in other connections, the movement of the thermostatic element underchanges of telnperature in the room or other place where the thermostatis situated being caused to control electric eircuits by means of whichsuch damper or valve controlling mechanisms are brought into operation,the thermostatic element being adjustable so as to effect the change inits electrical circuits at different degrees of temperature and theclock mechanism being employed to etl'ect desired adjustments of thethermostatic element at predetermined times.

My invention consists in the novel feature hereinafter describedreference being had to the accompanying dra-wings which show oneembodiment of my invention and a slight modification thereoi selected byme for purposes of illustration and the said invention is fullydisclosed in the following description and claims.

Referring to said drawings, Figure 1 repf resents a front elevation of athermostat with clock attachment embodying my invention and selected byme for the purpose of illustrating same. Fig. 2 is a, similar elevationwith the casing or screen of the thermostat removed and a portion of theclock broken away to show parts beneath. Fig. 3 isa partial elevation ofthe lower portion of the thermostat with the screen or casing removedand the clock'meehanism removed and showing the connections between theclock controlled actuating means and the adjusting mechanism for thethermostatic element. Fig. -L is a detailed sectional view on line l--tof Fig. 3, of the thumb piece of the thermostat, the adjusting mechanismfor the thermostatic element and the parts connected therewith. Fig. 5is a similar section through the same parts taken on a planeperpendicular to the plane on which Fig. 4 is taken. Figs. 6 and 7 aredetails showing the clock controlled actuating device for moving theadjusting mechanism for the thermostatic element. Fig. 8 is a detailedview lillustrating the .means for supporting and adjusting thethermostatic element. Fig. 9 is a detailed bottom plan view of thepointer and the clutch member connected therewith, the adjusting shaftbeing shown in section. Fig. 10 is a View similar to Fig. 2 showing aslight modification of my invention. Fig. l1 is a partial rear view ofthe thermostat shown in Fig. 10. Fig. 12 is a' detailed sectional Viewon the line 12-12 of Fig. l0. Fig. 13 is a detailed sectional viewshowing the devices for connecting the upper end of the clock case tothe thermostat body.

The object of my present invention is to provide the thermostat with aclock mechanism so constructed and combined therewith that it willadjust the thermostatic element at a predetermined time and to apredeter mined degree, while leaving the adjusting mechanism for thethermostatic element at all times except during the momentary operationof the clock controlled actuating mechanism, entirely free, so that itmay be readily adjusted by hand without interference from the clockcontrolled actuating mechanism.

My invention also has for its object to provide means for varying theextent to which the adjusting mechanism for the thermostatio elementsshall be moved by the clock controlled a'ctuatiner mechanism, whichmeans are located adjacent to the thumb piece by which the handadjustment of the thermostatic element is secured, and by themanipulation of which the said variation of movement may also beregulated.

My invention also provides a clock mechanism which will operate the saidadjusting mechanism on successive days, being preferably provided withan eight-day movement and said clock mechanism is also arranged so thatall the Winding and setting mechanisms of the device are at the front ofthe clock mechanism where they are readily accessible, the clockmechanism is also preferably provided with means for indicating when theactuating mechanism for the adjusting mechanism for the thermostaticelement, is fully wound and indicating at all times the extent to whichsaid actuating mechanism has partially run down so that these facts canalways be ascertained from an examination of the face of the clockmechanism with certainty.

In the embodiment of my invention herein shown in Figs. 1 to 9inclusive, which has.

been selected by me for the purpose of illustrating the invention, 1represents the main frame of the thermostat proper and 2 represents thethermostatic element which is in this instance secured to a plate 3pivoted at l to the frame of the thermostat and Yis provided at thevopposite end with a bifurcated portion 5 which engages an adjusting cam6 mounted upon an adjustingshaft 7 and rigidly secured thereto, so thata turn of said shaft and cam will move the plate 3 laterally to changethe position of the thermostatic element. The free end of thethermostatic element 2, lies between contacts 8 and 9 suitably securedto the thermostatic frame, being in this instance mounted upon anadjustable plate 10 pivoted to the thermostat frame and held in itsadjusted position by means of an adjusting screw 11 as set forth in myform-er Patent #1,048,277, dated December 24, 1912.

The adjusting shaft 7 above referred to is provided with a pointer 12rigidly secured thereto and traversing a suitable scale 13 secured tothe thermostat frame, the pointer in this instance being connected to acollar 14 secured to the adjusting shaft 7.

15 represents 'the clock which is preferably provided with an eight-daymovement secured to the thermostat frame. 1n this instance thethermostat frame is provided with a downwardly7 extendingplate 18 towhich theclock is secured in any desired manner. rlhe clock ispreferably provided with a hinged frame 17 carrying a glass cover plate,the said frame being normally held in closed position by a spring catch18 and capable of being swung outwardly to permit the winding or settingof the clock.

'The time mechanism is provided with a.

suitable winding stem 19 and the clock is also provided with springactuating clock controlled mechanism corresponding with the usual alarmmechanism of an ordinary eight-day clock which is wound by means of astem 20. Both of these stems extend through the dial 21 of the clock sothat they .may be wound from the front without diswhich for convenienceIdesignate alarm wind stem with a pinion 22 engaging a gear wheel 23 ona shaft 24 which extends through the dial of the clock and 1s providedwith a pointer or smallhand 25 aranged to traverse a small indicatingdial or circle 26 on the clock'dial which small dial or circle isprovided with suitable indications to designate the position of the handwhen the thermostat actuating mechanism is fully wound. This consists inthis instance of two marks indicated at 27, Fig. 1, between which thehand 25 will lie when the actuating mechanism is fully wound, therelative number of the teeth in the pinion 22 and gear wheel'23 beingsuch that the'hand 25 and said gear wheel 23 will be given one completerevolution in winding the actuating mechanism. Obviously the travel ofthe hand 25 around the circle or dial 2G will at all times indicate towhat extent the actuating mechanism has run down and said small dial orcircle may be provided with further indications to correspond with thenumber of days for which the mechanism may be operative, if desired. Theclock dial is also provided with a small circle or dial 30 havingindications corresponding to the twenty four hours of a day andpreferably divided numerically into two sections marked one to twelverespectively, one side of the dial being marked A. M. and the other sideP. M. as shown, and the clock mechanism is provided with suitable meanssimilar to those employed in an ordinary eight-dav alarm clock forreleasing the alarm wind spring and securing one revolution of the alarmwind stem 2O at any desired time in the twenty four hours whichmechanism is not herein specifically shown and will not be particularlydescribed, as said mechanism in itself does not constitute a part of mypresent invention. Said setting mechanism is provided with a hand orpointer 31 traversing the small setting dial 30 to enable the actuatingmechanism to be so set as to be released at any desired hour or fractionof an hour in the twenty four. The setting mechanism is also operatedfrom the face of the clock by means of a suitable key which may be madeto engage the shaft which carries the hand or pointer 31 in a well knownway. The clock is also preferably provided justing shaft 7 for operatingthe adjusting cam 6 and shifting the position of the thermostaticelement. Inthe present instance, the lever 38 is connected to one end bylink 39 to a lever 40 also vpivoted to the plate 16 and having at itsopposite end a pin 41 engaging a slot 42 in a push rod 43 the upper endof which is operatively connected to a short actuating arm 44 which isin turn operatively connected with the adjustin shaft 7. In order thatthe actuating mec anism of the clock may throw the pointer of thethermostat to different positions and thereby impart different degreesof movement to the adjusting mechanism for the thermostatic element, Iprefer to provide a clutchmechanism between the actuating arm 44 and theadjusting shaft 7. In the present instance I have shown the shaft 7provided with a cone clutch .the female member 45 of which is rigidlysecured to the shaft 7, being in this instance slipped over the shaft ansecured to the pointer 12 by means of a screw 46 which engages aconcentric slot in the pointer plate to permit of slight adjustment inassembling the parts. 47 refers to the male member of the clutch-whichis secured v to a sleeve 48 movable vertically and loosely normallypresses down the sleeve and clutch 65.- tuating mechanism. It will alsobe seen engaging-the shaft 7, said sleeve being counterbored to receivea spring 49 the lower end of lwhich engages the lower end of thecounterbore of said sleeve and the upper end engaging a part connectedwith the shaft 7, in this instance a collar 50 held in place by screw 51engaging shaft 7. The sleeve 49 is provided with a -thumb -piece 52which is preferably milled or otherwise roughened on its periphery sothat it may readily be turned by the thumb and finger. The pointer 12 ispreferably provided with a wide plate portion 12 which is marked with ascale of degrees of heat corresponding with the degrees on the scale 13and the sleeve 48 is provided with an auxiliary pointer 53 which travelsover the pointer scale 12X, as will be seen. The spring 49 member 47,holding the latterV in rm engagement with the clutch member 45 so thatthe thumb piece 52, both clutch members and the shaft 7 may be rotatedsimultaneously to move the cam 6 and adjust they thermostatic elementj2,by hand.

The actuating arm 35 of the clockmechanism normally stands in theposition indicated in Fig. 7 thatis to say out of contact with theflange 37 on lever 38 so that the thumb piece may be turned to the leftwithout interference between theparts connected therewith and theactuating mechanism of the clock. By reason of the slot 42 the thumbpiece may also be turned to the right as far, as the limits of theinstrument permit without interference with the clock acthat when thetime indicated by the position of the hand 31 on the setting dial 30 isreached the actuating mechanism of the clock will be released and thealarm wind stem 20 will make one complete revolution, and be stopped bythe mechanism of the clock, and in such revolution the friction roller36 will strike the lip 37 of the lever 38 and move the push rod 43upwardly, if the pointer 12 has been moved to the left a sufficientdistance, thereby pushing upward the short actuating arm 44 andpartially rotating the shaft 7 together with the pointers 12 and 53 andmoving the pointer 12 to the right to a predetermined position on thescale 13 of the thermostat. i If it is desired to move the pointer 12 toa different predetermined position itis necessary to adjust the relativepositions of the short actuating arm 44 and the shaft 7 which adjustmentis indicated by the-position of the auxiliary pointer 53 on the pointerscale 12X. Thus assuming that when the auxiliary pointer 53 is in aposition coincident with the pointer 12, the mechanism will cause thepointer 12 to be moved to a central position on the scale 13 whichindicates the temperature of which is the adjustment of the instrument Iprefer, if it were desired to throw the pointer 12, by means of theclock actuating mechanism, to, say, the user would simply pull out thethumb piece 52 and sleeve 48 sufficiently to disengage the clutchmembers 45 and 47 and move the auxiliary pointer 53 to the second-lineto the left of the pointer 12 on the pointer scale 12X (the lines ordegree indications on both scales being separated ordinarily 5), asshown in Fig. 3. If now the clock actuating mechanism is released thefriction j roller 36 will impart movement to the leve-rs 438 and 40 andthe push rod 43 and throw the pointer 12 to a position two indicationsto the right of the central indications (corresponding with 7 0) or inother words to the indication corresponding with 80. The thumb piece 52therefore serves the double purpose of effecting the independent handadjustment of the thermostatic element and also 'the adjustment of theconnections between the clock actuating mechanism and the adjustingmechanism for the thermostatic element to vary the position to which thesaid adjusting mechanism will be moved when the clock actuatingmechanism is brought into operation.

The thermostat will be provided with the usual casing or screen 60having thereon a thermometer 61 and provided with an aperture 62 throughwhich the scale 13 and pointers 12 and 53 may be seen and an aperture6.3 for the thumbl piece and also suit- As an example of the use of theinstrument just described let it be supposed that it is installed in adwelling and that electric connection from contacts 8 and 9 Aand acontact 2 connected with the thermostatic element are made to a suitabledamper controlling mechanism connected .with .the damp'ers of thefurnace supplying heat to the building. The thermostat vcan 'be set bymeans of the thumb piece 52 so that the thermostatic element will makecontact with one or the other of the contacts 8 `and 9 when thetemperature rises above, or falls below any desired degree. Where it isdesired to maintain a lower temperature during the night and a highertemperature during the day 'the mechanism may be set by adjusting theauxiliary pointer 53 with respect to the pointer 12 to secure thedesired day temperature and the clock mechanism may be set by means ofthe shaft-of the hand 31 to operate at a desired hour say 6 oclock a. m.The user will before retiring turn the thumb piece of the thermostat tothe left to set the instrument so as to maintain the desired lowtemperature during the night and the clock mechanism will be actuated atthe hour for which it is set on the following morning and will throw thepointer 12 up to the desired predetermined degree and adjust thethermostat automatically for the day temperature. Obviously the clockactuating mechanism will perform this service each morning during theoperation of the clock mechanism without -further attention it beingonly necessary to turn the pointer to the left to set the instrument tomaintain a low or night temperature. each night. lt will also be seenthat at all times the hand adjustment of the device may be efi'ected byturning the thumb piece in either direction without interference withthe clock controlled actuating mechanism.

In the foregoing description have referred to the adjusting mechanismfor varying the position of the thermostatic element. I wish it to beunderstood that my invention is equally applicable to that class ofthermo- Vstats in which the thermostatic element is.

stationarily mounted and the adjustment of the thermostat to cause it tooperate at different temperatures is effected by moving the contactscorresponding with contacts 8 and 9 with respect to the saidthermostatic element. 1 have therefore referred to the adjustingmechanism broadly in the following claims, as adjusting mechanism forvarying the operation of the thermostatic element.

In Figs. 10 to 12 inclusive a slightly different modification of myinvention is shown, in which la represents the body of the thermostat,2a the thermostatic element, which, in this instance, is rigidlyconnected at one end to the body lEl and has its movable portion, orblade, arranged between two contacts carried on a plate 3 pivotallymounted on the body l and provided with a mechanism for adjusting thelower end of the plate laterally, which, in this instance, consists ofan eccentric, 6, located between arms 5a forming a bifurcated lower endof the plate 3a. The cam, 6, is fast on a sleeve a and the said sleeveis provided-with a pointer, 12a, traversing a scale 13 on the thermostatbody.` A shaft, 4&8, extends through said lsleeve 7a and a clutchmechanism. is employed for normally holding the sleeve and' shaft unitedfor joint rotary movement. In this instancefthe sleeve is provided withthe male member 47 and the shaft with the female member 45 of a frictioncone clutch,'and the clutch members are held in engagement by a spring49 surrounding the shaft and extending from the sleeve 7 to a thumbpiece 52 by which the shaft can be turned and which is rigidly securedto the shaft. The thumb piece also carries an auxiliary pointer, 53a,which traverses the same scale as the main pointer 12. The shaft 18;L isconnected by an arm 44 with a push rod 43 secured to the back lplate 16of the device by means of a. screw 41a engaging a slot 42 inthe push rodand said ,push rod is provided with a lip or flange 37 adapted to beengaged by an eccentric or oval device 35 mounted on the shaft 20a ofthe alarm wind mechanism for effecting the adjustment of thethermostatic contacts automatically through the clock mechanism at anypredetermined time for which the clock mechanism is set. rlheconstruction of the parts is such that the eccentric device will alwaysthrow the pointer 53a to a predetermined point on the scale, as, forexample, represented by the central indication thereon, although theparticular point may be varied by changing the relation of the arm deito the shaft 48a. lf the thermostat is to be set by the clock at suchpredetermined point as 70, the main pointer 121- and the au'iiliarypointer 53 are made to coincide. if it is desired` to adjust thethermostat to a higher temperature than that for which the auxiliarypointer is adjusted, the operator will turn 'the main pointer 12a bymeans of the thumb piece to the desired higher temperature, as say 80,and then push in the thumb piece so as to release the clutch members 45and L17 and turn the Aauxiliary pointer back to its predetermined pointon the scale as 70. Conversely, if the desired day temperature is below70, the proper adjustment of the mechanism to produce that result ofclock actuation can be accomplished by setting the main pointer l2a tothe lower temperature desired, then releasing the clutch and setting theauxiliary pointer 53a in advance of the main pointer at thepredetermined temper- ISO ature. In this manner the desired adjustmentof the day temperature may be accurately determined without the use ofan auxiliary scale.

In Figs. 10 to 12 the clock case is show as rectangular, and it ispreferably detachably connected to the thermostat frame so that it canbe removed for adjustment or repair if necessary, without disturbing thethermostat. In this instance, the clock body 17is provided with studs16a at its upper end, having hook portions 16b which detachablyengage'suitable apertures in the bottom of the thermostat body 1a asshown in Fig. 13. A back plate 16c issecured to the thermostat body bymeans of screws 16d extending through the front of the thermostat, saidplate extending below the thermostat body and preferably having a lip 16extending forwardly at the lower end to receive and assist in supportingthe clock case when the hooks 16" have been placed in engagement withthe thermostat body as before described. A retaining,r screw 16t ispreferably passed through the lip 16e and into the clock case, as shownin Fig. 1l, so that the .clock is rigidly but detachably secured to thethermostat body. When it is desired to remove the clock, it is onlynecessary to remove the screw 16f, when, by moving the lower end of vthe clock case outward, the hooks 16b may be disengaged from thethermostat body. It will be understood that the push rod 43 is securedby its screw 11a to the back plate 16, as before stated, in properrelation to the eccentric device 35a, and the clock can therefore beremoved and replaced without effecting the relations of these parts. Theth 1;-3'

mostat body is provided with suitable h/I/gs 50u for enabling thethermostat to be attached to the wall or other support upon which it ismounted.

The clock is provided with a hinged frame 17b at the front, givingaccess to the winding and setting devices for the time movement and thethermostat actuating movement, all of which are accessible from thefront without disturbing the fixed relation of the clock and thermostat.

What I claim and desire to secure by Letters Patent is:

1. The combination with a thermostat having an adjusting mechanism forvarying the operation of the thermostatic element, of a clock mechanismprovided with a time mechanism and an actuating mechanism controlledthereby constructed to effect a plurality of similar operations of theadjusting mechanism, at intervals, winding mechanism for the timemechanism, separate winding mechanism for the said actuating mechanism,indicating mechanism operatively connectedv with the winding mechanismfor said actuating mechanism, for indicating the number of operations ofthe adjusting mechanism thereby, and operative connections between thesaid actuating mechanisml and said adjusting mechanism.

2. The combination with a thermostat provided with an adjustingmechanism for varying the operation of the thermostatic element, and ahand operated device for actuating said adjusting mechanism, of a clockmechanism operatively connected with said thermostat and provided with atime movement, and an actuating mechanism controlled thereby operativeconnections be` tween said actuating mechanism and the adjustingmechanism Jfor the thermostatic element and adjusting mechanism forvarying the extent of movement ot' the adjusting mechanism for thethermostatic element, operatively connected with said hand operateddevice.

3. The combination with a thermostat provided with an adjustingmechanism for varying the operation of the thermostatic element, and ahand operated device connected with said adjusting mechanism, of a clockmechanism secured to the thermostat and provided with a time mechanismand an actuating mechanism controlled thereby, operative connectionsbetween said actuating mechanism and the adjusting mechanism for thethermostatic element, including relatively movable parts, means fornormally holding said relatively movable `parts in fixed relation and aconnection between the hand operated device and one of the said parts`-for temporarily separating and adjusting the said relatively movableparts.

,/ 4. The combination with a thermostat provided with an adjustingmechanism for varying the operation of the thermostatic element, and ahand operated device connected with said adjusting mechanism, of a clockmechanism secured to the thermostat and provided with a time mechanismand an actuating mechanism controlled thereby, operative connectionsbetween said actuating mechanism and the adjusting mechanism for thethermostatic element, including relatively movable parts, and clutchmembers for connecting the same, means for holding said clutch membersnormally in engagement and a connection between one of said clutchmembers and said hand operated device for separating said clutch membersand adjusting said relatively movable parts.

5. The combination with a thermostat provided with an adjustingmechanism for varying the operation of the thermostatic element, and ahand operated device connected with said adjusting mechanism, of a clockmechanism secured to the thermostat and provided with a time mechanismand an actuating mechanism controlled thereby, operative connectionsbetween said actuating mechanism and the adjusting mechanism for thethermostatic element, including relatively movable parts and frictionclutch members for connecting said parts, a spring normally holding saidclutch members in engagement with each other, said hand operated devicebeing connected With one of said clutch members for disengaging saidclutch members and adjusting said relatively movable parts.

6. The combination with a thermostat provided with an adjusting`mechanism for varying the action of the tliermostatic element, a handoperated device connected with said adjusting mechanism, a clockmechanism connected with the thermostat and provided with a timemechanism, and an actuating mechanism controlled thereby, operativeconnections betweensaid actuating mechanism. and said adjustingmechanism including relatively movable parts, said relatively movableparts being provided each with an indicating device, means for holdingsaid parts in fixed relation and a connection between said hand operateddevice and one of the said parts for temporarily disconnecting andadjusting said relatively movable arts with respect to each other.

7. he combination with a thermostat provided with an adjustingimechanismfor varying the operation of the thermostatic element, a hand operateddevice connected with said adjusting mechanism, a pointer connected withsaid adjusting mechanism, and a scale on the thermostat coperating withsaid pointer, of a clock mechanism connected with the thermostat andprovided with a time mechanism and an actuating mechanism controlledthereby, operative connections between said actuating mechanism and thesaid adjusting mechanism including relatively movable parts, one of saidparts being connected with the aforesaid pointer and the other of saidparts being provided with an auxiliary pointer coperating with the firstmentioned pointer, means for holding said parts in fixed relation andmeans for connecting one of the said parts with said hand operateddevice for temporarily separating and adjusting said relatively movableparts.

8. rllie combination with a thermostat provided with adjusting mechanismfor varying the operation ot the thermostatic element, a hand operateddevice connected. with said adjusting mechanism, a pointer connectedwith said adjusting mechanism and a scale on the thermostat coperatingwith said pointer, ot a clock mechanism connected with the thermostatand provided with a time mechanism and an actuating mechanism controlledthereby, operative connections between said actuating mechav nism andsaid adjusting mechanism including relatively movable parts one of saidparts having a fixed 0relation with said pointer, and the other of Saidparts being provided with an auxiliary pointer, means for holding saidrelatively movable parts in fixed relation ,and connections between thesaid 'hand operated device and the one of said parts provided with theauxiliary pointer for temporarily disconnecting the saine and adjustingthem with respect to each other.

9, The combination with a thermostat.

mally in fixed relation, said parts being provided each with a pointer,a single scale cooperating with said pointers, and connections betweenone of said parts and the hand operated device for temporarilyseparating said parts and adjusting them with respect to each other.

l0. The combination with a thermostat provided with adjustingmechanismfor varying the operation ot' the thermostatic element, asleeve connected with said adjusting mecha-nism, a pointer connected tosaid sleeve and stationary scale for said pointer of a hand operatedshaft extending through said sleeve, and longitudinally movable withrespect thereto, coacting clutch members for connecting said shaft andsleeve, a spring normally holding said clutch members in operativerelation, a clock controlled actuating mechanism` 'and connectionsbetween said mechanism and said shaft.

in testimony wliereoj l' aiiix my signature in the presence oittwowitnesses.

D--.VD BELDEN. l-ilitnesses C. Tiii/'Islaam l?. d. MURPHY.

